package com.mes.utils;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpSession;
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import java.io.UnsupportedEncodingException;
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import java.util.*;
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/**
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* web工具类
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*
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* @author kong
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*/
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public class WebNbUtil {
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// 工具方法
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/**
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* 取出一个值，我保证不乱码,tomcat8及以上版本此方法废掉
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*/
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public static String getParam(HttpServletRequest request, String key) {
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try {
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request.setCharacterEncoding("UTF-8");
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// 获得v
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String value = request.getParameter(key);
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if (value != null && "GET".equals(request.getMethod())) {
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value = new String(value.getBytes("ISO-8859-1"), "UTF-8");
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}
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return value;
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} catch (UnsupportedEncodingException e) {
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return null;
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}
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}
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/**
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* 取出一个值，我保证不乱码,tomcat8及以上版本专用
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*/
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public static String getParam8(HttpServletRequest request, String key) {
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try {
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if (request.getCharacterEncoding() == null) {
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request.setCharacterEncoding("UTF-8");
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}
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return request.getParameter(key);
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} catch (UnsupportedEncodingException e) {
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return null;
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}
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}
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/**
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* 将一个值，强制转码ISO_8859_1-->utf-8
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*/
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public static String getIso88591(String str) {
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try {
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if (str == null) {
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return str;
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}
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return new String(str.getBytes("ISO-8859-1"), "UTF-8");
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} catch (Exception e) {
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e.printStackTrace();
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}
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return str;
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}
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/**
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* 将一个request请求所携带的参数封装成map返回
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* <br/>对于数组型参数，此方法不能正确获得值
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*
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* @param request
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* @return
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*/
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public static Map<String, String> getParamsMap(HttpServletRequest request) {
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Map<String, String> map = new HashMap<>(16);
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try {
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//获得K列表
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Enumeration<String> paramNames = request.getParameterNames();
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request.setCharacterEncoding("UTF-8");
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while (paramNames.hasMoreElements()) {
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try {
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//获得k
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String key = paramNames.nextElement();
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//获得v
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String value = request.getParameter(key);
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if ("GET".equals(request.getMethod())) {
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}
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map.put(key, value);
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} catch (Exception e) {
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e.printStackTrace();
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}
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}
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} catch (Exception e1) {
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e1.printStackTrace();
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}
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return map;
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}
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/**
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* 将一个request请求所携带的参数封装成map返回 ，带集合的
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*/
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public static Map<String, Object> getParamsMap2(HttpServletRequest request) {
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Map<String, Object> map = new HashMap<>(16);
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// 获取所有参数
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Map<String, String[]> parameterMap = request.getParameterMap();
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for (String key : parameterMap.keySet()) {
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try {
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// 获得values
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String[] values = parameterMap.get(key);
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if (values.length == 1) {
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map.put(key, values[0]);
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} else {
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List<String> list = new ArrayList<String>();
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for (String v : values) {
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list.add(v);
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}
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map.put(key, list);
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}
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} catch (Exception e) {
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throw new RuntimeException(e);
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}
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}
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return map;
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}
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/**
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* 将一个request请求Header所携带的参数封装成map返回
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*/
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public static Map<String, String> getHeaderMap(HttpServletRequest request) {
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Map<String, String> map = new HashMap<>(16);
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try {
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//获得K列表
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Enumeration<String> paramNames = request.getHeaderNames();
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request.setCharacterEncoding("UTF-8");
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while (paramNames.hasMoreElements()) {
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try {
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//获得k
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String key = paramNames.nextElement();
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//获得v
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String value = request.getHeader(key);
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if ("GET".equals(request.getMethod())) {
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new String(value.getBytes("ISO-8859-1"), "UTF-8");
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}
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map.put(key, value);
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} catch (UnsupportedEncodingException e) {
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e.printStackTrace();
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}
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}
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} catch (Exception e1) {
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e1.printStackTrace();
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}
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return map;
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}
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/**
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* 返回请求端的IP地址
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*/
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public static String getIp(HttpServletRequest request) {
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String ip = request.getHeader("x-forwarded-for");
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ip = checkIp(ip) ? ip : (
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checkIp(ip = request.getHeader("Proxy-Client-IP")) ? ip : (
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checkIp(ip = request.getHeader("WL-Proxy-Client-IP")) ? ip :
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request.getRemoteAddr()));
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return "0:0:0:0:0:0:0:1".equals(ip) ? "127.0.0.1" : ip;
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}
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private static boolean checkIp(String ip) {
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return NbUtil.isNull(ip) && !"unknown".equalsIgnoreCase(ip);
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}
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/**
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* 返回指定地址在服务器上的绝对路径
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*/
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public static String getRealPath(HttpSession session, String path) {
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// 路径
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return session.getServletContext().getRealPath(path);
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}
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/**
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* 返回项目的http地址
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*/
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public static String getHttpUrl(HttpServletRequest request, String port) {
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String path = request.getServletContext().getContextPath();
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StringBuffer url = request.getRequestURL();
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String http = url.delete(url.length() - request.getRequestURI().length(), url.length()).toString();
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if (port != null && !"".equals(port) && !"80".equals(port) && !"443".equals(port)) {
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if (http.endsWith(":" + port) == false) {
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http += ":" + port;
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}
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}
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http += path;
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if (http.endsWith("/") == false) {
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http += "/";
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}
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return http;
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}
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/**
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* 检测request请求是否为ajax
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*/
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public static boolean isAjax(HttpServletRequest request) {
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return !(request.getHeader("x-requested-with") == null);
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}
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/**
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* 将指定key的参数转化为int类型，转化不了的给默认值
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*/
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public static int getInt(HttpServletRequest request, String key, int defaultValue) {
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try {
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String argStr = request.getParameter(key);
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return Integer.valueOf(argStr);
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} catch (Exception e) {
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return defaultValue;
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}
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}
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}
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